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8. Communication Satellites
Communication satellite around the earth are used by Information Technology for spreading information through out the globe.
Figure shows as to how using satellites an information from an earth station, located at a point on earth's surface ca be sent throughout the world.
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FAQs on Communication Satellites - Physics for JAMB
| 1. What are communication satellites? |  |
Ans. Communication satellites are artificial satellites that are placed in orbit around the Earth to relay telecommunications signals. They are designed to receive signals from one location on Earth and transmit them to another location, allowing for long-distance communication.
| 2. How do communication satellites work? | |
Ans. Communication satellites work by receiving signals from ground-based stations, amplifying them, and then retransmitting them back to Earth. These signals can carry various types of data, such as voice, video, and internet data. The satellites are equipped with transponders that receive and transmit these signals using radio waves.
| 3. What are the advantages of using communication satellites? | |
Ans. There are several advantages of using communication satellites. Firstly, they enable long-distance communication, even in remote areas where terrestrial communication infrastructure is lacking. Secondly, they can transmit signals simultaneously to multiple receivers, allowing for widespread broadcasting. Additionally, communication satellites provide reliable and secure communication services, especially during natural disasters or emergencies.
| 4. How are communication satellites launched into space? | |
Ans. Communication satellites are launched into space using rockets. These rockets carry the satellite payload and propel it into orbit around the Earth. The most common type of rocket used for satellite launches is the expendable launch vehicle. Once the rocket reaches the desired orbit, it releases the satellite, which then uses its onboard propulsion system to fine-tune its orbit.
| 5. How long do communication satellites usually last? | |
Ans. The lifespan of communication satellites varies depending on various factors such as design, technology, and operational conditions. On average, a communication satellite can last between 10 to 15 years. However, with proper maintenance and efficient use of resources, some satellites have been known to exceed their expected lifespan. Once a satellite nears the end of its operational life, it is either decommissioned or moved to a different orbit to avoid cluttering the space environment.
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